Using the Circle Technique. 1  1. Place the shoes on a flat surface. 2  2. Tie a basic knot. 3  3. Tie another knot, but donât tighten it.  4. Thread one shoelace into the 1  circle. 5. Thread the other shoelace into the circle.  6. Pull the bunny ears tight.
The caffeine in coffee can also contribute to stomach pain through several different means. Caffeine stimulates the central nervous system, which can cause the stomach to produce excess stomach acid. This excess stomach acid can contribute to gastritis or ulcer formation.
The link between coffee and upset stomach can be related to caffeine and heartburn. The caffeine in coffee may stimulate production of stomach acids, causing heartburn. Heartburn can then cause upset stomach. Caffeine is a stimulant that increases heart rate which can be directly linked to nausea.